The present invention relates to an improved ball tossing device that is portable and adjustable to accommodate a variety of different balls and lobbing preferences. This may be achieved through various features including some or all of the following: a ball feeding mechanism using a rotating disk with an offset feed channel to deliver balls to the ball tossing queue; a catapult arm that uses a motor/spring mechanism to toss balls in the queue out of the machine; an indexer feature for isolating the ball to be tossed from the other balls in the queue; and adjustable features that allow users to vary ball trajectory of the ball being tossed.